103RD GENERAL ASSEMBLY
State of Illinois
2023 and 2024
SB3758
 
Introduced 2/9/2024, by Sen. Bill Cunningham
 
SYNOPSIS AS INTRODUCED:
 
20 ILCS 3125/15
    Amends the Energy Efficient Building Act. Provides that the Capital Development Board shall adopt specified provisions into the Illinois Energy Conservation Code concerning insulation in an unvented attic and an unvented enclosed rafter assemblies.


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A BILL FOR
 
SB3758LRB103 37459 MXP 67581 b

1    AN ACT concerning State government.
 
2    Be it enacted by the People of the State of Illinois, 
3represented in the General Assembly:
 
4    Section 5. The Energy Efficient Building Act is amended by 
5changing Section 15 as follows:
 
6    (20 ILCS 3125/15)
7    Sec. 15. Energy Efficient Building Code.  
8    (a) The Board, in consultation with the Agency, shall 
9adopt the Code as minimum requirements for commercial 
10buildings, applying to the construction of, renovations to, 
11and additions to all commercial buildings in the State. The 
12Board, in consultation with the Agency, shall also adopt the 
13Code as the minimum and maximum requirements for residential 
14buildings, applying to the construction of, renovations to, 
15and additions to all residential buildings in the State, 
16except as provided for in Section 45 of this Act. The Board may 
17appropriately adapt the International Energy Conservation Code 
18to apply to the particular economy, population distribution, 
19geography, and climate of the State and construction therein, 
20consistent with the public policy objectives of this Act. 
21    (b) The Board shall adopt the following provisions into 
22the Illinois Energy Conservation Code: insulation in unvented 
23attics and unvented enclosed rafter assemblies and insulated 
 
 
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1and air sealed with air impermeable R-30 insulation, with a 
2maximum U-Factor of 0.038, are deemed to meet the requirements 
3of Section R402 of the Illinois Energy Conservation Code with 
4all of the following requirements:
5        (1) The house shall attain a blower door test result 
6    less than 2.5 air changes per hour at 50 pascals. 
7        (2) The house shall require a positive, balanced, or 
8    hybrid whole house mechanical ventilation system that does 
9    not rely solely on a negative pressure strategy.
10        (3) Where insulation is installed below the roof deck 
11    and the exposed portion of roof rafters are not already 
12    covered by the R-30 depth of the air-impermeable 
13    insulation, the exposed portion of the roof rafters shall 
14    be insulated by minimum R-3 unless directly covered by 
15    drywall or finished ceiling. Roof rafters are not required 
16    to be covered by minimum R-3 if a continuous insulation is 
17    installed above the roof deck.
18        (4) Indoor heating, cooling, and ventilation 
19    equipment, including ductwork, shall be inside the 
20    building thermal envelope. 
21(Source: P.A. 102-444, eff. 8-20-21; 102-662, eff. 9-15-21; 
22102-813, eff. 5-13-22.)